the only reason fear didn't break is because the dots you had on did no dmg, because the warlock either didn't have dots on you, or had horrible proc uptime.
if you get sheeped and lava bursted for 300k do you also think sheep doesn't break on damage?
if i had a single agony on someone in s15, fear would break after 2-3 ticks, which is about 3seconds.
now i clearly understand how op fear was in mop (and earlier), but saying it didn't break fast enough in mop just proves you're a moron (like most other people) that doesn't realize that the only reason it's not breaking is because you're not taking any dmg, until those 3x 100k lava bursts hit you.
Something else that contributed to fear not breaking faster was shitty server responsiveness (i'm guessing) which they now made better?
i cannot count the times i have been disorient roared or chastised with 5 dots on and it lasted for 1 or 1.5 seconds (which should instantly break on any dmg as well).
edit: if you played early wotlk you would've known of fear thresholds. it used to be 20% health to break fear now that was insanely retarded